TY JOUR TI CONCEPT OF MODERN TECHNOLOGY FOR PROCESSING LITTERLESS MANURE KW biologization KW diversification KW litterless manure KW separate collection of manure KW manure processing JO Vestnik of Kazan State Agrarian University AU Smirnov, P.A. AU Alekseev, E.P. AU Smirnov, M.P. AU Egorov, V.P. AU Vagizov, T.N. PY 2025 IS 20 PB Kazan state agrarian University